The operating room (OR) and procedural suites represent some of the most complex and high-stakes environments in medicine. Unlike outpatient or ward-based care, these settings demand precise coordination among multidisciplinary professionals, including surgeons, anesthesiologists, certified registered nurse anesthetists (CRNAs), anesthesiologist assistants (AAs), nurses, technologists, and trainees. Success hinges not only on technical expertise but also on structured communication, shared situational awareness, and reliable systems for crisis management. Surgical teams, supported by circulating and scrub nurses, execute operative plans while maintaining sterility and efficiency. The anesthesia team—comprising attending anesthesiologists, residents, fellows, CRNAs, and AAs safeguards patient physiology, manages airway and hemodynamics, and leads responses to intraoperative crises. World Health Organization surgical safety checklists, structured handoffs, and crisis resource management principles are integral to reducing errors and improving outcomes. Beyond the operating theater, anesthesia’s role extends to procedural areas such as interventional radiology, endoscopy, cardiac catheterization, and electroconvulsive therapy, where comparable risks exist, but resources may be less robust. Academic centers add layers of safety and education by integrating residents and fellows under structured supervision, which enhances redundancy and system resilience during emergencies. For internists, understanding the OR’s dynamics clarifies the rationale behind preoperative optimization, explains intraoperative physiology and limitations, and illuminates the pathway to postoperative complications. By recognizing the structured choreography of OR teams and the leadership role of anesthesiology within them, internists can engage more effectively in perioperative consultation, postoperative management, and interprofessional communication.